I have decided to make the $50 robot, and started by laying out the electronics on a breadboard (not connecting servos and photoresistors), and downloading , building and uploading the photovore /$50 robot code supplied by admin.

I use atmega8 uC, AVR ISP mk2 programmer, and AVR studio 5.1

There are no error messages when I build the code, or when I program the atMega8 uC (memories -> Program)

However, the LED does not come on as PD4 port does not go low.

If anyone has any ideas about how I can troubleshoot this, it would be highly, highly appreciated!